Chapman, Robert L., author
London Pan Books 1988
Buku Referensi
Barnhart, Clarence
Garden City, New York, Doubleday, 1967
Buku Referensi
Lewis, Norman
New York Harper and Row 1963
Buku Referensi
Tom Dalzell, Terry Victor, editor
Routledge, 2006
Buku Referensi
Tom Dalzell, Terry Victor, editor
Routledge, 2006
Buku Referensi